Aircraft



FIG. 1 is a perspective view of an aircraft showing my new design;

FIG. 2 is a top plan view of said aircraft;

FIG. 3 is a side elevational view of said aircraft, the elevational view of the other side being substantially a mirror image thereof;

FIG. 4 is an elevational view of the front of said aircraft;

FIG. 5 is an elevational view of the rear of said aircraft; and

FIG. 6 is a bottom plan view of said aircraft. 

The ornamental design for an aircraft, substantially as shown and described. 